[Sussex] Anyone into bondage?

[Ronan Chilvers]

On Thu, 29 Sep 2005 16:55:23 +0100
Jon Fautley <jfautley at redhat.com> wrote:

> Brendan Whelan wrote:
> > Jon,
> > 
> > Thanks for the info.
> > 
> > On the connectivity, I mean that if the cable is moved from eth0
> > (Onboard NIC) to eth1 (Offboard NIC) then I cannot connect.
> 
> Bonding won't work in this manner. You need to have a cable connected
> to both interfaces for it to function correctly.

Eh?  I have a bonded interface on an ubuntu machine here which works
great and I can yank a cable from either interface and not lose
connectivity.  Surely that's a big part of the advantage of bonding
interfaces - redundancy????

> 
> > I am using Fedora core 3.
> 
> Good Man :)

You'd feel much better if you were ubuntised...

:-)

> 
> > Using "ifconfig eth0 up" and "ifconfig eth1 up"made no difference.
> > 
> > When the cable is connected to the onboard NIC:
> > ethtool eth0|grep "Link" gave Link detected yes
> > ethtool eth1|grep "Link" gave Link detected no
> > 
> > When the cable is connected to the offboard NIC:
> > ethtool eth0|grep "Link" gave Link detected no
> > ethtool eth1|grep "Link" gave Link detected no - the cable is
> > obviously physically connected as one of the leds is on and another
> > is flashing - presumably because the other end of the link is
> > transmitting.
> 
> This means that the network card doesn't support link detection. Is
> this the Realtek NIC?
> 
> If the system can't detect a Link Down condition then you may run
> into problems with Bonding as the system will always think the NIC is
> OK and connected. You should try and swap the offboard for one with a
> different chipset.

Good thought.  I've tried bonding where one of the cards was an old
10mb 3Com 509, which didn't support link detection and had no joy at
all.

Any chance that you can rustle up a couple of matching cards to try?

Cheers

Ronan
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